Render world copies | Mapbox GL JS

Toggle between rendering a single world and multiple copies of the world using setRenderWorldCopies. If renderWorldCopies is true and the map is using a rectangular projection, multiple copies of the world will be rendered side by side beyond -180 and 180 degrees longitude.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Render world copies</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.14.1/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.14.1/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
#menu {
position: absolute;
background: #fff;
padding: 10px;
font-family: 'Open Sans', sans-serif;
}
</style>
 
<div id="map"></div>
<div id="menu">
<div>Set <code>renderWorldCopies</code> to:</div>
<div>
<input type="radio" id="true" name="rtoggle" value="true" checked="">
<label for="true">true</label>
</div>
<div>
<input type="radio" id="false" name="rtoggle" value="false">
<label for="false">false</label>
</div>
</div>
 
<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
const map = new mapboxgl.Map({
container: 'map', // container ID
// Choose from Mapbox's core styles, or make your own style with Mapbox Studio
style: 'mapbox://styles/mapbox/streets-v12', // style URL
projection: 'mercator', // Projection needs to be  `mercator' or `equirectangular` to render world copies
center: [179, 0], // starting position [lng, lat]
zoom: 0.01 // starting zoom
});
 
const menu = document.getElementById('menu');
const inputs = menu.getElementsByTagName('input');
 
// If input clicked has `id` "true", set renderWorldCopies to true.
// Otherwise, set to false.
function switchRenderOption(option) {
map.setRenderWorldCopies(option.target.id === 'true');
}
 
for (let i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchRenderOption;
}
</script>
 
</body>
</html>